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Carry On Luggage Size Guide

Use this page to verify carry-on limits in inches and centimeters, compare typical luggage size bands, and jump to airline-specific rules.

Most Common Limit
22 x 14 x 9 in is a common benchmark across many US airlines.
What To Measure
Always measure outer dimensions including wheels and handles.
Final Rule
TSA states carry-on dimensions vary by airline. Airline policy is final.
Common Luggage Size Bands

Swipe horizontally to view full table

Size BandInch RangeVolume (L)Best For
Carry-on Small18-2030-451-3 days
Carry-on Standard20-2235-502-5 days
Medium Checked24-2660-905-10 days
Large Checked28-3295-13010+ days

Quick Facts

These facts are formatted for fast AI extraction and direct citation.

Common carry-on benchmark
22 x 14 x 9 in (56 x 36 x 23 cm)
Who defines final carry-on size
Airline policy (not one global TSA dimension)
Main measurement method
Outer dimensions by side length, including wheels and handles
Volume used as final acceptance rule
Usually no
Primary risk near limit
Gate-check due to strict sizer or limited overhead space

How to Measure Before You Compare Limits

Person measuring luggage dimensions before airline size check

Measure the outer length, width, and height before checking airline limits.

Always include wheels and handles, because this is how airport sizers evaluate your bag.

See full measurement guide
How Airlines Calculate Luggage Size

Airline baggage limits in inches are based on the outer box dimensions of your bag, not volume.

  • Carry-on rule (most common): single-side limits such as 22 x 14 x 9 in (L x W x H).
  • What must be included: wheels, handles, feet, and any rigid external parts.
  • What is not used as the main rule: liters/cubic volume is usually not the acceptance criterion.
  • Sizer logic at airport: if the bag does not fit the frame, it can be denied or gate-checked.

Quick Airline Carry-on Comparison

These examples cover the most searched US airlines. Always verify your exact route and fare before departure.

AirlineCarry-on (in)Carry-on (cm)Notes
Delta Air Lines22 x 14 x 956 x 35 x 23official
American Airlines22 x 14 x 956 x 36 x 23official
Southwest Airlines24 x 16 x 1061 x 41 x 25official
United Airlines22 x 14 x 956 x 35 x 23secondary

Most Common Carry-on Benchmark

Many US airlines use 22 x 14 x 9 in (about 56 x 36 x 23 cm), including wheels and handles.

TSA guidance confirms that carry-on dimension rules vary by airline, so you should treat this as a starting point, not a guaranteed pass.

On smaller regional aircraft, even compliant bags can be gate-checked due to overhead space limits.

How to Avoid Gate-check Problems

  • Leave a 1-2 cm safety margin; a bag at exact maximum can fail rigid sizers.
  • Do not overfill front pockets; depth is the most common fail point.
  • Pack essentials (passport, medication, chargers) in your personal item in case of forced gate-check.

How to Choose the Right Carry-on Size for Your Trip

For 1-3 day trips, 18-20 inch bags are safer across strict carriers and smaller aircraft. For 3-5 day trips, 20-22 inch bags are practical if you pack efficiently.

If you often fly regional routes, prioritize slightly smaller shells and softer materials because strict bin space can force gate-check even when your bag is close to the limit.

If your fare type has restrictions, use a personal item-first strategy and keep high-value essentials with you.

Related Pages

Airline Carry-on RulesChecked Luggage Size GuideHow to Measure Luggage
Data Sources